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Unit recovery sequence optimization method based on confidence gap decision

A sequence optimization and unit technology, applied in the direction of circuit devices, AC network circuits, electrical components, etc., can solve problems such as the impact of recovery time is not considered, and achieve the effect of avoiding delayed start of units, ensuring solution speed, and ensuring quality

Active Publication Date: 2022-03-29
HEFEI UNIV OF TECH
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Problems solved by technology

Although wind-solar combined new energy systems can alleviate the inherent intermittency of wind turbines and photovoltaic power sources, there are still uncertainties
In addition, at present, extensive research has been carried out on the problem of unit recovery sequence optimization in the black start phase, but most of the literature does not consider the impact of the recovery time of the transmission line on the recovery sequence model of the unit during the restoration of power supply in the power outage system in the optimization model of the unit recovery sequence. Impact

Method used

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  • Unit recovery sequence optimization method based on confidence gap decision
  • Unit recovery sequence optimization method based on confidence gap decision
  • Unit recovery sequence optimization method based on confidence gap decision

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Embodiment Construction

[0111] In this example, if image 3 As shown, a robust optimization method for unit recovery sequence based on confidence gap decision-making is applied in the black start phase of power system recovery. The power system includes wind-solar combined new energy systems, black start units with self-start capability, Non-black start units without self-start capability and key transmission paths between nodes, and establish the unit start-up power curve and unit output characteristic curve according to the recovery characteristics of each unit node. The main steps of the method include: obtaining wind-solar combined new energy In the typical output scenario of the system, a deterministic optimization model of unit restoration sequence considering the participation of wind-solar combined new energy system is proposed. Stick optimization strategy; build a model on the AMPL platform and call the solver CPLEX to solve it, and obtain the robust optimal plan for the recovery sequence of...

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Abstract

The invention discloses a unit recovery sequence optimization method based on a confidence gap decision, and the method comprises the steps: 1, comprehensively considering the participation of a wind-light combined new energy system and the influence of a key power transmission path in a unit recovery process, and putting forward a unit recovery sequence certainty optimization model; 2, introducing a confidence gap decision theory, taking a maximum deviation coefficient as a target function, and proposing a unit recovery sequence robust optimization model based on the confidence gap decision theory, 3, processing probability constraints involved in modeling by adopting a scene method; and 4, building a model on an AMPL platform, calling a commercial solver CPLEX to carry out iterative solution, and obtaining a unit recovery sequence robust optimal scheme. According to the method, a unit recovery sequence scheme considering participation of the wind-light combined new energy system after power failure of the power system can be effectively obtained, so that the power supply recovery speed of the power failure system is effectively improved, and the power loss time of the power system is shortened.

Description

technical field [0001] The invention relates to the field of power system restoration, in particular to a robust optimization method for unit restoration sequence that comprehensively considers the uncertainty of the wind-solar combined new energy system output and the influence of key transmission paths during unit startup. Background technique [0002] Experts and scholars at home and abroad have carried out in-depth research on power system restoration issues involving new energy units, but mainly focused on large-scale wind farms, large-capacity photovoltaic power plants, and micro-grids operating in isolated islands. Considering the participation of wind-solar combined new energy systems There are few studies on black start emergency response plans. Although wind-solar combined new energy systems can alleviate the inherent intermittency of wind turbines and photovoltaic power sources, there are still uncertainties. In addition, at present, extensive research has been c...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/46H02J3/48H02J3/38H02J3/00
CPCH02J3/466H02J3/48H02J3/381H02J3/0075H02J2203/10H02J2203/20H02J2300/24H02J2300/28Y04S10/52
Inventor 孙磊杨智超刘宜楠丁江
Owner HEFEI UNIV OF TECH
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